condition mean min max 4 h after light 1.8904999999999998 1.8376 1.9434 8 h after light 4.096959999999999 4.00118 4.19274 12 h after light 3.34775 3.12096 3.57454 4 h after dark 5.1943850000000005 3.28984 7.09893 8 h after dark 1.6716099999999998 1.53595 1.80727 12 h after dark 1.760485 1.6975 1.82347